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. 1993 Jun;79(2):248–254.

Relationship of antibodies against CD4+ T cells in HIV-infected patients to markers of activation and progression: autoantibodies are closely associated with CD4 cell depletion.

C Müller 1, S Kukel 1, R Bauer 1
PMCID: PMC1421877  PMID: 8102120

Abstract

Antibodies against lymphocytes have been shown in human immunodeficiency virus (HIV)-infected patients, but their relevance in the pathogenesis of acquired immune deficiency syndrome (AIDS) remains controversial. We investigated increased levels of lymphocyte surface Ig and antibodies against CD4+ T cells in the plasma. The relationship to CD4 cell depletion and serological parameters were analysed. A three-colour flow cytometric method was used to detect surface Ig on the surface of patients' cells and antibodies in the plasma of the patients. We observed a high percentage of patients with increased surface Ig on CD4+ T cells (94%-47/50). Antibodies in the plasma reacting with healthy donors' CD4+ T cells were detectable in 72% (23/32) of the patients. CD4 cell-surface Ig correlated well with surface Ig on different T-cell subpopulations but not with increased surface Ig on B cells. Only one control showed elevated surface Ig, plasma antibodies against lymphocytes were not detectable. Surface Ig levels of CD4+ T cells were closely associated with the CD4 cell number in HIV-infected patients of all stages of disease (r = -0.67, P = 0.00005). Other lymphocyte subsets' surface Ig did not show a significant association to CD4 cell depletion. Surface Ig and antibodies against CD4+ T cells were not related to levels of beta 2-microglobulin, p24 antibodies or interleukin-6 (IL-6), and did not depend on hypergammaglobulinaemia. In conclusion surface Ig on CD4+ T cells is likely to have an autoantibody origin. The high prevalence and association to CD4 depletion support the view that autoimmune phenomena could be involved in the pathogenesis of AIDS.

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Selected References

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